Dräger Narkomed 2B Service Manual page 96

REPLACEMENT PROCEDURES (continued)
Replacement Procedure 2:
4.19.30 Set the System Power switch to STANDBY, remove AC power from
the machine, and disable all circuit breakers.
4.19.31 Close all cylinder valves, and disconnect the pipeline hoses from the
machine.
4.19.32 Press the O
4.19.33 Adjust the TIDAL VOLUME knob to fully extend the volume
indicator to its minimum setting.
4.19.34 Disconnect the bellows hose and the scavenger hose from the bellows
assembly. Loosen the wingnuts and remove the bellows assembly and
the canister.
4.19.35 Remove the canister from the bellows box by pulling it downward.
4.19.36 Remove the screws holding the front panel and tidal volume
adjustment knob, and remove the panel. The knob assembly remains
with the panel. On machines with a two-piece panel, remove the
angle plate above the knob panel.
4.19.37 Remove the screws holding the monitor box to the ventilator box.
WARNING:
4.19.38 Raise the front of the monitor box chassis approximately four inches,
and prop the box open.
WARNING:
4.19.39 Remove the bellows guide by unscrewing its stem from the bellows
adjustment rod.
4.19.40 Remove the volume indicator from the bellows adjustment rod by
loosening its two set screws. Note the position of the indicator on the
rod so that it can be reassembled in the same manner.
4.19.41 Remove the screws securing the muffler access panel at the rear of
the bellows box, and remove the panel.
RETURN TO THIS MANUAL'S TABLE OF CONTENTS
RETURN TO CD-ROM TABLE OF CONTENTS
FLUSH button to relieve pressure from the system.
2
Two people are required to perform the remaining
portion of the procedure.
Ensure that AC power is removed from the
machine before raising the monitor box. Failure to
observe this precaution may cause injury by
electric shock.
4-64
NM2B
Rev. A